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arXiv math-ph/0507017math-phgr-qchep-thmath.MP
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离散几何的连续极限

The Continuum Limit of Discrete Geometries

Manfred Requardt

摘要:

在现代物理学的各个领域,特别是在量子引力或基础时空物理学中,拥有一个系统的过程是非常重要的,通过这个过程,可以从一个更原始的和基本上离散的底层构造一个宏观的或连续极限,它可能以一种非常不稳定和不规则的方式表现。我们发展这样一个框架内的一般度量空间的范畴内,结合最近的工作,我们自己和独创性的想法Gromov等人,在纯数学发展。两个核心概念发挥着核心作用。一方面,(离散)空间的内在尺度维数的概念,或者用数学术语来说,度量空间在无穷远处的增长度,另一方面,一般度量空间之间的度量距离的概念,以及在这个度量空间的空间中执行的适当的尺度极限(我们称之为几何重整化群)。在这样做的时候,我们证明了各种物理上有趣的结果的性质,这一限制过程,性质的极限空间,例如什么先决条件有资格作为一个光滑的经典时空,特别是它的尺寸。

英文摘要:

In various areas of modern physics and in particular in quantum gravity or foundational space-time physics it is of great importance to be in the possession of a systematic procedure by which a macroscopic or continuum limit can be constructed from a more primordial and basically discrete underlying substratum, which may behave in a quite erratic and irregular way. We develop such a framework within the category of general metric spaces by combining recent work of our own and ingeneous ideas of Gromov et al, developed in pure mathematics. A central role is played by two core concepts. For one, the notion of intrinsic scaling dimension of a (discrete) space or, in mathematical terms, the growth degree of a metric space at infinity, on the other hand, the concept of a metrical distance between general metric spaces and an appropriate scaling limit (called by us a geometric renormalisation group) performed in this metric space of spaces. In doing this we prove a variety of physically interesting results about the nature of this limit process, properties of the limit space as e.g. what preconditions qualify it as a smooth classical space-time and, in particular, its dimension.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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